Security readout for executives and security teams
This is an old PuTTY client vulnerability fixed before version 0.63. A malicious or compromised SSH server could send a crafted DSA signature that crashes the client, and the record notes possible memory corruption or code execution. The main business risk is legacy PuTTY installations still used for administrative access. Exposure is most likely on endpoints, jump boxes, or packaged systems running PuTTY before 0.63, especially where users connect to untrusted, attacker-controlled, or compromised SSH servers. Treat this as a legacy-client cleanup item with moderate urgency. Prioritize administrative systems because PuTTY is often used for privileged server access, but current evidence does not show known active exploitation. Mitigation focus: Upgrade PuTTY to version 0.63 or later.; Apply fixed PuTTY packages from the operating system vendor.; Remove old standalone PuTTY binaries from managed endpoints..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2013-4206 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
Products and packages named in the record
CWE details
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